Arm and maybe the pedal too. I think the pedal will be a feel thing if it's slightly tweaked.. not sight. Swap the pedal back and forth with a new pedal once the new chainset is fitted to see if you can feel a difference.

Strap a mini maglight (or better a laser pointer) to the bottom of the pedal, pointing forwards. Put the bike in a darkish room pointing head-on towards a wall - ideally clamp the bike in a stand. Rotate the crank backwards a turn and watch the point of light. If it moves from side-to-side rather than just up and down then something's bent. To test if it's the pedal or crank, you could try the test again with a different pedal, or take the pedal off and inspect its axle.

Jeez, all that sounds complicated. Look, you're on the decking there, it's perfect. Line the front and rear wheels with a gap between the planks and then see if the same points on either side of the pedal are parallel with the lines in the decking. Dead simple.

That's so bent it's not even funny. Just looking at the first photo I can immediately tell, as should anyone else with eyes, from right across a very spacious room that that crank is the bentest thing anyone will see all day. Replace the crank, check the pedal. And as you had a crash big enough to do that much damage to a crank, check the rest of the bike (and yourself) closely too before riding again.

Made some enquiries but don't think you can get spare axles for those pedals and obv a new chainset will be a fair chunk. What with the jersey I trashed and the dental work on my tooth this crashing malarky can be quite pricey